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@uiten tetes gareel @fitr-r HAYWARD A. HARVEY, 0F NEW YORK,-v N. Y.

Letters Patent No. l63,385, dated April 2, 1867.

IMPROVED WIItE STAPLE.

@te tlgtmtlt :interet it' in time @hitters @intent mit uniting pat at tigt, smite.

Be it known that I, HAYWARD A. HARVEY, of the city, county, andState of New York, have invented a new and improvel Wire Sta-plc, for which I desire-to ohtaii Letters Patent of the United States. The follow` ing is a. full and exact description of my invention, reference being had to the accompanying drawings, which illustrate and form a part of this specification. y

The nature of my invention consists in forming one or more indentations in that portion of each leg of the staple which enters the Wood, and at 4the same time spreading the metal at the 'points where these indentations are produced, thus increasing the diameter of the wire in one direction by reason of this lattening process, and decreasing it in the other. The drawings present a front and side view of the staple.

Figure I the side view, showing the outline of the indentations; end

Figure 2 the frontview, showing the eft'ect of the ilattening or compressing process in altering the contour ci the edges ci' the Wire, and making projections at the point of indentation.

Similar letters of reference designa-te corresponding parts in both figures.

a indicates the outer or rounded end of the staple, and a the points thereof. The indcntations are shown at b Zw, and the projections at c e e e. This form ci' staple may he readily produced hy ordinary and wellknown mechanical means, which I do not deem it necessary to describe. In using it, it will be perceived that while the wood yields readily when the staple isidriven, the elasticity of the wood causes it to spring haelt; and conform itself more or less to the various irregularities in the legs of the staple, thus increasing the frietional hold upon them and theresistance against the withdrawing of the staple. Iam aware that similar results have been sought to be obtained, especially in the article of blind-staples, by corrugating or nicliing the legs, but I have never heretofore seen a staple formed as mine is, by compressing or ilattening the vwire at intervals, so as tc make protuherances on the edges as well as depressions on the sides, the efcct of which, as is obvious, is to present inequalities of surface in two directions, so that whether the staple he driven parallel to the grain or across it its surface presents cavities in the directions of the greatest elasticity oi' the wood.

`What I claim as my own invention, is

A staple with the legs thereot` formed with protuberances and depressions, substantially as described.

Y H. A. HARVEY.

Witnesses: i

Guss. Monsun, EDWD. PAYsoN. 

